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Quick Start Guide for Nexus
Q.1:
Bench Check
Q.1.1: Meters with Auxiliary Power
Apply appropriate power to Auxiliary power cable.
Display information scrolls. See Fig. 1.2.
Q.1.2: Meters without Auxiliary Power
Apply appropriate power to voltage terminals.
Terminals are determined by Meter Form (on the
front plate of the meter). For Forms 9S and 36S,
connect power source to one of the three left most
and to the right most voltage terminals (center
row of smaller terminals). See Fig. 1.3 & 1.4.
Q.2:
PC to Meter Communications
Q.2.1: Optical Port
Connect with Modbus RTU, 9600.
Connect SC-3 Smart Coupler (RS232) from Nexus
meter's Optical Port to a PC's (9- or 25-pin) serial port
(or)
Q.2.2: Serial Communications
Connect with Modbus RTU, 57600.
Connect meter's Port 1 (or 4) (RS485) to PC's RS232
serial port via a Unicom RS485/ RS232 Converter.
Q.3:
Install Communicator EXT Software
& Connect
Ethernet: Connect with Network, Modbus TCP, 57600.
Modem: Connection Manager, Modbus ASCII, 57600.
Q.4:
Configure Programmable Settings
From Main Screen, click the Profile Icon. Communicator EXT
displays the Meter's Initial Profile for editing.
Before making changes, click SAVE to Save the Initial Settings
as Initial Settings.NPS* on hard drive.
Click on the (+/-) icon, double-click on the selected parameter.
The screen appears. Make changes. Click OK. Then use buttons
at the bottom of the screen to UPDATE DEVICE, SAVE, LOAD,
print a REPORT or CANCEL. Section 1.5 reviews screens.
SAVE the new NPS File as Modified Settings.NPS or as a unique
identifying name (Example: Unique System ID or Customer's Name).
To implement changes, click UPDATE DEVICE.
To LOAD a new or different file, select a file name.
RESET ALL LOGS in Communicator EXT Main screen > Tools > Reset.
Q.5:
Device Profile Screens
General Settings
Site Information (CT, PT Ratios)
If you are using Block Demand, Transformer Loss Compensation, other than
15 minute demand, or Load Profile Recording (Trending in Communicator EXT)
the Initial Settings should be changed. NOTE: Any change to CT settings will
automatically update the corresponding Full Scale value in the Limit and
Waveform Full Scales settings and will effect all other settings.
NOTE: Make sure settings are correct for installation site.
Electro Industries/Gauge Tech
Bench Check saves field time.
®
Type S Meters
®
®
Fig. Q.1: The Nexus
1272 Meter
Fig. Q.3: 9S, 36S Aux Terminals
Fig. Q.5: 1262/1272 Device Profile
Doc # E151701
Optional
Aux
Power
Cable
Fig. Q.2: 1272 Rear Diagram
Voltage
Terminals
Common
Fig. Q.4: 45S Aux Terminals
Fig. Q.6: CT & PT Settings
Hanger
Modem/
Ethernet
Q-1
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